Replace a Wall of Windows — Stacked and Side-by-Side Units as One Job
The back of your house is mostly glass — a great room or living room wall of stacked windows — and it is fogging, leaking or losing heat all at once.
Reply within one business day. Or call / text 763-204-2099.
To replace a wall of windows, every stacked and side-by-side unit is measured, the wall is ordered as one job so the glass and frames line up, and the units are set from staging with temporary support where the old frames carry load. JMB Builders closes the wall each night and protects the floors inside. Twin Cities metro north to St. Cloud. Priced per project; photo reply within one business day, or book a free in-home estimate.
- Priced per project, every unit listed
- Ordered as one wall so lines match
- Wall closed up every night
A wall of windows is a dozen openings acting like one. The units line up in rows and columns, the mulls between them carry the wall above, and the glass near the floor and near doors has to be safety glass. Replace them one at a time over the years and the rows never line up again.
We measure every unit and the wall as a whole: header line, mull posts, sill height, and what is carrying the load between the units. The order goes in as one wall so frame color, glass and grille lines match. Units low to the floor or next to a door are ordered with the safety glass code requires.
Install is staged. Scaffold or a lift goes outside, floors and furniture inside are covered, and the wall comes out one section at a time. Where old mulls carry load, temporary support goes in first. Each section is set, flashed and sealed before the next one opens, and the wall is closed — glass or sheathing — before we leave each day.
Get a written quote for this job
Three photos and a sentence is enough: a reply within one business day, or ask for a free in-home estimate. Or text the photos to 763-204-2099.
What you supply
- Furniture moved off the wall and out of the work path
- Frame color, glass and grille choices for the whole wall
- Room for scaffold or a lift outside, and access for it
What JMB supplies
- Measure of each unit and a check of the header, mulls and load
- Every unit ordered together, safety glass where code requires
- Scaffold or lift outside, floor and furniture protection inside
- Temporary support where the old units carry load
- Section-by-section install, closed up every night
- Flashing, sill pans and sealant across the wall
- Interior and exterior trim, haul-away and photos in your job folder
How it is priced: per project
Quoted in writing from your photos, with a reply within one business day. What moves the number:
- Number of units, rows and the overall height
- Mull posts, reinforcement and temporary support
- Safety glass where units are low or near doors
- Scaffold or lift needed outside
- Rot in sills, mulls or the header
- Interior trim scope across the wall
Send a straight-on photo of the wall from inside and outside, and a photo of the ground below the wall outside. The in-home estimate checks the framing.
How long it takes
Most window walls take two to five working days once the units arrive, depending on size and height. Lead time depends on the brand and is written on the quote.
How your project works
- 1
Photos and a first look
Send photos of the wall inside and out. You hear back from us within one business day, and the free in-home estimate is booked.
- 2
Measure the wall
Each unit and the wall as a whole measured; header, mulls and load checked; safety glass locations marked.
- 3
One order
Every unit ordered together. Lead time depends on the brand and is written on the quote; staging is booked to match delivery.
- 4
Stage and protect
Scaffold or lift outside, floors and furniture covered inside, temporary support set where it is needed.
- 5
Section by section
Each section removed, set, flashed and sealed before the next opens. The wall is closed every night, trimmed at the end.
Replace a Wall of Windows — Stacked and Side-by-Side Units as One Job: questions, answered
Can a whole wall of windows be replaced at once?
It is ordered and scheduled as one job, then installed one section at a time. That keeps the opening small enough to close every night and lets each section be flashed before the next comes out.
Do floor to ceiling windows need safety glass?
Glass close to the floor, near doors, and large panes in certain positions have to be safety glass under the building code. We mark those units at the measure and order them tempered. The rest of the wall can be standard insulated glass.
Is a wall of windows structural?
The wall above is carried by a header and often by mull posts between the units. In some houses the old window frames ended up carrying part of the load. We check it at the measure and set temporary support before those units come out; a header or post that has to change is sized by an engineer.
How do you protect my floors when replacing a large window wall?
Floors in the room and the path to the door are covered before anything comes out, furniture is moved or covered, and the glass is carried out and in with suction lifters. The room is swept at the end of each day.
Can a wall of windows be replaced in winter?
Yes, with planning. Only one section is open at a time, it is closed before night, and sealants and exterior finishes are applied within their temperature limits. Very cold or windy days may move the schedule.
Should the new window wall have more opening windows?
Often, yes. Old window walls are mostly fixed glass. Swapping some fixed units for casements or awnings in the same openings adds air without changing the look. We show the options at the measure.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and the builders we work with. Counts come straight from our job log; no customer names.
Related jobs we do
Picture Window Replacement — Large Fixed Glass Set and Trimmed
A fogged living room window, a picture window that frosts at the bottom, or an old unit you want to open up with casements. We replace it and finish the trim.
Read moreTrapezoid Window Replacement — Gable and Clerestory Windows Up High
The angled windows high in your vaulted living room have fogged or leak at the corners, and nobody can reach them without a plan.
Read moreFour Season Sunroom Window Replacement — Fogged, Hot or Drafty Walls
Your four season room is a wall of glass. Some units are fogged, the room bakes in summer and chills in January, and you want windows that fix it.
Read moreWhole House Window Replacement — One Measure, One Order, Room by Room
Every window in the house at once: one measure, one order, one schedule, and the house closed up every night.
Read moreReplace a Triple Window Unit — Mulled Twins and Triples as One
You have two or three windows joined into one wide unit — triple casements, twin double-hungs or a picture window with casements — and the whole thing is failing.
Read more1.5 Story Dormer Window Replacement — Upstairs Knee Wall Bedrooms
The upstairs windows in the dormers are drafty and hard to reach, and the bedrooms up there are the coldest rooms in the house.
Read morePage reviewed October 9, 2026 · JMB Builders LLC, MN license BC809005 · All windows pages
Where we work
Window Replacement & Installation near you
Based in Zimmerman, scheduling across the Twin Cities metro. Closest first: